TY - JOUR
T1 - Effect of molecular weight of polystyrensulfonic acid sodium salt polymers on the precipitation kinetics of sodium bicarbonate
AU - Martínez-Cruz, Nancy
AU - Carrillo-Romo, Felipe
AU - Jaramillo-Vigueras, David
N1 - Funding Information:
The authors acknowledge the financial support given by CONACyt and IPN.
PY - 2004/10/1
Y1 - 2004/10/1
N2 - This paper analyzes the effect of polystyrensulfonic acid sodium salt (NaPSS), obtained by kinetic precipitation from solutions of polymers of molecular weight 245 000 and 38 000 g mol-1 in sodium bicarbonate (NaHCO3) itself precipitated from synthetic brine. Crystal size, shape and the additive adsorbed are reported. X shaped and hexagonal prisms crystals with different aspect ratios were obtained. The results show that with increasing polymer concentration the crystal size decreases, from 0.27 to 0.48 mm. Additionally, the higher molecular weight polymer shows both higher adsorption capacity and higher crystal habit modification. Crystal shape patterns were similar for both polymers; however, the higher molecular weight material induced changes at lower concentration. It was observed that the precipitation rate reached a minimum with increasing additive concentration.
AB - This paper analyzes the effect of polystyrensulfonic acid sodium salt (NaPSS), obtained by kinetic precipitation from solutions of polymers of molecular weight 245 000 and 38 000 g mol-1 in sodium bicarbonate (NaHCO3) itself precipitated from synthetic brine. Crystal size, shape and the additive adsorbed are reported. X shaped and hexagonal prisms crystals with different aspect ratios were obtained. The results show that with increasing polymer concentration the crystal size decreases, from 0.27 to 0.48 mm. Additionally, the higher molecular weight polymer shows both higher adsorption capacity and higher crystal habit modification. Crystal shape patterns were similar for both polymers; however, the higher molecular weight material induced changes at lower concentration. It was observed that the precipitation rate reached a minimum with increasing additive concentration.
KW - A1. Additive
KW - A1. Crystal habit
KW - A1. Precipitation kinetics
KW - A2. Growth from solutions
KW - B1. Polystyrensulfonic acid
KW - B1. Sodium bicarbonate
UR - http://www.scopus.com/inward/record.url?scp=4544227716&partnerID=8YFLogxK
U2 - 10.1016/j.jcrysgro.2004.06.024
DO - 10.1016/j.jcrysgro.2004.06.024
M3 - Artículo
SN - 0022-0248
VL - 270
SP - 573
EP - 581
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
IS - 3-4
ER -